102111201205 has 16 divisors (see below), whose sum is σ = 132357786624. Its totient is φ = 75177368640.

The previous prime is 102111201173. The next prime is 102111201211. The reversal of 102111201205 is 502102111201.

It is not a de Polignac number, because 102111201205 - 2⁵ = 102111201173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2351509 + ... + 2394538.

It is an arithmetic number, because the mean of its divisors is an integer number (8272361664).

Almost surely, 2^102111201205 is an apocalyptic number.

It is an amenable number.

102111201205 is a deficient number, since it is larger than the sum of its proper divisors (30246585419).

102111201205 is a wasteful number, since it uses less digits than its factorization.

102111201205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4746396.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 102111201205 its reverse (502102111201), we get a palindrome (604213312406).

The spelling of 102111201205 in words is "one hundred two billion, one hundred eleven million, two hundred one thousand, two hundred five".